Ch 11: The Cardiovascular System
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Created by:
13baguilar on March 11, 2011
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24 terms
Terms | Definitions |
|---|---|
 electrocardiogram | a recording of the electrical activity of the heart |
| P wave | the period during which the atria are depolarizing |
| T wave | the period during which the ventricles are repolarizing |
| QRS wave | the period during which the ventricles are depolarizing, which proceeds their contraction |
| Bradycardia | an abnormally slow heartbeat, that is below 60 beats per minute |
| Tachycardia | an abnormally rapid heartbeat, over 100 beats per minute |
| heart block | damage to the AV node, totally or partially releasing the ventricles from the control of the sinoatrial (SA) node |
| Angina pectoris | Chest pain, resulting from ischemia of the myocardium |
| circle of Willis | an anastomosis that allows communication between the posterior an anteriior blood supplies of the brain |
| umbilical vein | the vessel carrying the oxygen and nutrient-rich blood to the fetus and placenta |
| ductus venosus | the shunt that allows most fetal blood to bypass the liver |
| anterior cerebral artery, middle cerebral artery | two pairs of arteries, arinsing from the internal carotid artery |
| basilar artery | the posterior cerebral arteries, serving the brain, arise from here |
| ductus arteriosus | fetal shunt between the aorta and the pulmonary trunk that allows the lungs to be bypassed by the blood |
| foramen ovale | opening in the interatrial septum that shunts fetal blood from the right to the left atrium, thus bypassing the fetal lungs |
| pulse | expansion and recoil of an artery during heart activity |
| blood pressure | pressure exerted by the blood against the blood vessel walls |
| cardiac output, peripheral resistance | (2) Factors related to blood pressure |
| constriction of arteriosa | event primarily responsible for peripheral resistance |
| systolic blood pressure | Blood pressure during heart contraction |
| diastolic blood pressure | blood pressure during heart relaxation |
| over arteries | site where blood pressure determinations are normally made |
| pressure points | points at the body surface where the pulse may be felt |
| sounds of Karotkoff | sounds heard over a blood vessel when the vessel is partially compressed |
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